Showing papers on "Wireless published in 1979"

Electronic voting system

Abstract: An electronic voting system includes a plurality of wireless response units, each response unit capable of transmitting several different digitally coded signals. Each of these digitally coded signals corresponds to the response of a person responding to a given stimulus. Each response unit transmits a selected digitally coded response via a radio frequency signal during one of a series of time intervals, a different time interval corresponding to each of the response units. An interrogating and response processing unit signals the response units to commence response transmission and receives, processes and displays the transmitted responses for observation by selected persons.

Wireless temperature-sensing system inclusive of thermally-responsive oscillator

Abstract: A wireless temperature-sensing assembly adapted for a cooking apparatus such as a microwave oven, comprises a wireless communication element and a sensing probe. The wireless communication element provides electromagnetic waves over an oven cavity of the cooking apparatus. The sensing probe selects a particular frequency of the electromagnetic waves. The sensing probe contains an oscillator element resonance frequencies of which vary depending on the surrounding temperature. The wireless communication element further receives and detects the particular frequency of the electromagnetic waves defined by the selecting means. In a specific form, the wireless communication element provides the electromagnetic waves the frequencies of which vary from time slot to time slot. The oscillator element may be composed of crystal, ceramic, or the like. The resonance frequencies of the oscillator element change due to variation in its number of proper vibrations dependent on the surrounding temperature.

Communication system for stationary and mobile subscribers

Abstract: A communication system for stationary and mobile subscribers includes a number of subscriber stations interconnected in a ring circuit and adapted for two-way communication with other subscriber stations, via a ring circuit. A transceiver station is also connected into the ring circuit and is adapted for two-way communication with the ring, and for two-way wireless communication with mobile subscriber stations, and serves to interconnect the mobile stations for two-way communication with the stations connected with the ring. Each of the subscriber stations of the ring circuit are connected by conventional means with a telephone switching network, and a call directed to such a station is selectively switched to the ring for communication with a mobile station having the same address or identification as the called station. The ring comprises a transmission line in which plural channels are transmitted by time division multiplex, with each station having access to every channel, and adapted to transmit and receive one information block per multiplex frame. The information block contains an address or identification of the called station so that information can be extracted from the multiplex transmission only by the station set having a corresponding address. The ring transmission line may be formed as a light wave guide, and is adapted for use with small, as well as for large systems.

2GHz-band cordless telephone system

Abstract: Generaly, the cordless telephone has the function to eliminate the telephone line by using the radio so the operator can use the telephone anywhere in the service area of the radio without a limit of the telephone line. This paper describes about the cordless telephone using 2GHz-band and having the same functions as that of the ordinary telephone.

Wireless earphone unit

Abstract: PURPOSE:To make it possible to wireless-receive signals transmitted from the acoustic unit main body, by providing a receiving antenna, a receiving part and a sounding part inside the earphone unit. CONSTITUTION:Ear contact part 12 is provided on the reverse face of the earphone, and this part is provided with through holes 13 which cause sound generated by the sounding part to pass through. Loop-form ear hook part 14 is provided coaxially in the earphone main body. Ear hook part 14 is formed with flexible resin and so on. The inside of earphone main body 11 and ear hook part 14 are provided with receiving antenna 21, a receiving part, a sounding part, and a power source. Receiving antenna 21 is stored in groove part 142 provided along the reverse face part of ear hook part 14 to form a loop-form antenna.

Wireless communication equipment

Abstract: PURPOSE:To know the state of the telephone carrier by securing an automatic transmission of the answer signal to the called signal at the master station for the wireless telephone set.

Coupling speed controller for powered vehicle

Abstract: PURPOSE:To couple together safely, by automatically controlling a diesel locomotive (DL) by means of a signal of a position detector of the DL when the DL is coupled with a freight train. CONSTITUTION:In the case of a DL 40 being coupled with a freight train 60-1, and when the DL and freight train come close to each other, a proximity switch 72 turns on, a signal is input to a wireless transmitter 74, and a low speed instruction is given to a wireless receiver 42. After the receiver 42 received the signal, the signal is input to an automatic train operating device 43, and they run at a low speed to couple together couplers 41 and 46. After coupling has been performed, a limit switch 47 turns on, and the automatic train operating device 43 stops the DL 40.

Release control system for wireless circuit

Abstract: PURPOSE:To avoid the invalid holding of the wireless circuit in case the telephone receiver is out of position, by cutting off forcedly the mobile wireless telephone via the howler signal.

Wireless hearing aid device

Abstract: PURPOSE:To obtain a safe hearing aid function as well as to ensure its adjustment by burying the driving unit part into the bone to give the vibrations to the human body and then driving the driving unit with the electric wave. CONSTITUTION:The voice supplied into mike 1 at carrying part A is converted through aural processor 2 into the signal suited to the hearing sense property of the user. With this signal, the high frequency signal of transmitter 3 is modulated to be transmitted. Driving unit part B is buried at bone part C at the back of the human ear, and high frequency receiver 4 within part B demodulates the transmission signal. Then the demodulation output is supplied to driving unit 5, and the vibrations of unit 5 are transmitted to sound sensor part D through the bone.

Alarming device for washer

Abstract: PURPOSE:To notice a washing completion to a user who is positioned apart from a washer, by transmitting by wireless a washing completion signal, and by producing an alarm sound from a receiver. CONSTITUTION:A completion signal 19 generated from a timer 1 incorporated in a washer proper works an alarm oscillating circuit 2 of a transmitting unit 20. An alarm signal passes through a modulating transmitting circuit 4 and transmits a signal from an antenna 5. The signal is received at an antenna 6 of a receiving unit 13, and is converted to an alarm signal at a receiving circuit 7, which is composed of a tuning circuit and demodulating circuit, being equivalent to a transmitting frequency. Next, it is amplified by an alarm signal amplifying circuit 18, and an alarm sound is produced from a speaker 9 via a condenser 8. The receiving unit is portable type, but it can be housed in a washer proper as occasion demands. At that time it changes to a wire type which is constituted in such manner that couples together an alarm signal output 3 of the transmitting unit 20 and an alarm signal input 16 of the receiving unit 3 by means of a connector and the like.

Ae measuring device of wireless transmission type

Abstract: PURPOSE:To make a cable unnecessary and to simplify the circuit constructon so that the size of the AE measuring device may be reduced by converting the waveforms of AE signals from an AE wireless sensor, which is mounted in a test piece, and subjecting the wave forms to FM modulation so that they may be transmitted and received with electric waves.

Guiding wireless line for location of moving body

Abstract: PURPOSE:To reduce a fly-back line to a common one, while increasing the receiving sensitivity, by providing a reference circuit, in which one of plural paired lead wires is formed into a coil loop, and by forming one of the pairs into a coil loop at alternate polarities.

Communication system for fixed and mobile subscribers

Abstract: not available for EP0009626Abstract of corresponding document: US4535441A communication system for stationary and mobile subscribers includes a number of subscriber stations interconnected in a ring circuit and adapted for two-way communication with other subscriber stations, via a ring circuit. A transceiver station is also connected into the ring circuit and is adapted for two-way communication with the ring, and for two-way wireless communication with mobile subscriber stations, and serves to interconnect the mobile stations for two-way communication with the stations connected with the ring. Each of the subscriber stations of the ring circuit are connected by conventional means with a telephone switching network, and a call directed to such a station is selectively switched to the ring for communication with a mobile station having the same address or identification as the called station. The ring comprises a transmission line in which plural channels are transmitted by time division multiplex, with each station having access to every channel, and adapted to transmit and receive one information block per multiplex frame. The information block contains an address or identification of the called station so that information can be extracted from the multiplex transmission only by the station set having a corresponding address. The ring transmission line may be formed as a light wave guide, and is adapted for use with small, as well as for large systems.